<http://webisa.webdatacommons.org/prov/470142220>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/288673453> .
<http://webisa.webdatacommons.org/288673453>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/288673453>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com.au> .
<http://webisa.webdatacommons.org/288673453>	<http://www.w3.org/ns/prov#value>	"FIG. 1 is an overall cross sectional view of a reducing projection optical system for use in a copy which uses a conventional refracting system;" .